diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md
new file mode 100644
index 0000000..3785188
--- /dev/null
+++ b/.github/pull_request_template.md
@@ -0,0 +1,18 @@
+# 📌 문제 링크
+(문제 링크 또는 문제 캡처본을 첨부해주세요.)
+
+
+---
+
+## 📝 문제 개요
+- 
+
+---
+
+## 🧩 풀이 과정 요약
+-
+
+---
+
+## 😁 결과
+(문제 해결 결과를 첨부해주세요.)
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
index ea71d50..37813b7 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" project-jdk-name="21" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="ms-21" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/src/week01/Yoepee/BOJ_1000.java b/src/week01/Yoepee/BOJ_1000.java
deleted file mode 100644
index 2a360f4..0000000
--- a/src/week01/Yoepee/BOJ_1000.java
+++ /dev/null
@@ -1,4 +0,0 @@
-package week01.Yoepee;
-
-public class BOJ_1000 {
-}
diff --git a/src/week01/Yoepee/PG_42576.java b/src/week01/Yoepee/PG_42576.java
new file mode 100644
index 0000000..2398e92
--- /dev/null
+++ b/src/week01/Yoepee/PG_42576.java
@@ -0,0 +1,50 @@
+package week01.Yoepee;
+
+import java.util.*;
+
+public class PG_42576 {
+    public static String solution(String[] participant, String[] completion) {
+        String answer = "";
+        Arrays.sort(participant);
+        Arrays.sort(completion);
+        for(int i =0; i<participant.length; i++){
+            if (i == participant.length-1) return participant[i];
+            if (participant[i].equals(completion[i]) == false) {
+                return participant[i];
+            }
+        }
+        return answer;
+    }
+
+    public static String solution2(String[] participant, String[] completion) {
+        String answer = "";
+        Map<String, Integer> map = new HashMap<>();
+        for(int i =0; i<participant.length;i++){
+            map.merge(participant[i], 1, (v1, v2) -> Math.max(v1,v2)+1);
+        }
+        for(int i =0; i<completion.length;i++){
+            map.merge(completion[i], 0, (v1, v2) -> v1-1);
+        }
+        for(int i =0; i<participant.length;i++){
+            if(map.get(participant[i]) == 1){
+                answer =participant[i];
+                break;
+            }
+        }
+
+        return answer;
+    }
+
+    public static void main(String[] args) {
+        // 정상 결과: "leo"
+        System.out.println(solution(new String[]{"leo", "kiki", "eden"}, new String[]{"eden", "kiki"}));
+        // 정상 결과: "vinko"
+        System.out.println(solution(new String[]{"marina", "josipa", "nikola", "vinko", "filipa"}, new String[]{"josipa", "filipa", "marina", "nikola"}));
+        // 정상 결과: "mislav"
+        System.out.println(solution(new String[]{"mislav", "stanko", "mislav", "ana"}, new String[]{"stanko", "ana", "mislav"}));
+        // 정상 결과: "b"
+        System.out.println(solution(new String[]{"a", "b", "a", "c", "d"}, new String[]{"a", "a", "c", "d"}));
+        // 정상 결과: "b"
+        System.out.println(solution(new String[]{"a", "a", "b", "a", "c", "d"}, new String[]{"a", "a", "a", "c", "d"}));
+    }
+}